Elastic tire.



No. 877,471. PATENTBD IAN. 21, 1908. M. BRUN.

ELASTIC TIRE. APPLICATION FILED SEPT. 27. 190e.

MATHEU BRUN, oF won-FRANCE.

ELASTIC TIRKE.

Specification of Letters Patent.

Patented Jan. 21, 1908.

Application led September 27, 1906. Serial No. 336.430.

' vide a construction comprlsing a series of gitudinal section4 of a portion of a tire and improved iiexible and resilient elements surrounded or inclosed by -a continuous insulating tire, the nature of these elements being'such that the elasticity thereof is felt only under determined pressures.

In the annexed drawing Figure 1 is a lonnot comprising an air chamber. Fig. 2 is a similar view to Fig. 1 but showing anair chamber inserted. Figs. 3, 4 and 5 show different methods of connectincr or assembling the corrugated steel collars hereinafter referred to, and Fig. 6 is a cross-section of another form of tire constructed accordv ingto this invention.

tical or any other cross-section comprises an y. externally smooth and internally corrugated I may be'exact collar A of rubber, cork, leather or an other suitable elastic material adapted to ecome distorted only under pressure. The shape, number and dimensions of the corrugations are proportional to the degree of elasticity desired according to the application of the,

tire. Within said corrugated collars, others B of the same corrugated form but of elastic steel are located and againwithin the collars B still further externally corrugated and interior smooth collars C of rubber cork or other flexible material are placed.

The collars A and C are each preferably made in a single piece, but the collars B may be formed by a corrugated blade or plate the ends of which are connected by soldering before hardening; or riveted as in Fig. 4, or preferably connected by a screw D (Fig. 3) the flat and extended head D1 of which bears on the collar along its entire Width and holds same in a similar manner as if the ends were riveted. Thescrewtraverses the outer collar A and wheel rim E the element beingv secured by means of a nut F.

The 4various elements are preferably somewhat larger at their outer side than at their inner side (Figs. 3 and 4) in order that they y juxtaposed." The elements are lsurrounded by or inclosed in a cover G which prevents dirt and dust from'penetrating to the interior.

In place of using a series of juxtaposed collars A the outer rubber corrugated cover may be-formed in a single pieceextending around the whole circumference of the tire or wheel, in which case said cover would be given' the 'usual form of inclosing or outer cover'as shown in Fig. 6, and the cover G might be dispensed with.

'Ihe various inner rubbercollars C could also be made of a single lcircumferential piece, in which case in order vto adapt the steel collars B thereto it is necessary to make the corrugations Aof the latter'collars somewhatl larger than those of the rubber .elements, so that they may be exactly juxtaposed mechani :allyr after being put in place.

The object of the corrugation of the collars is as follows: Firstly, for increasing the resistance of the steel elements imparting thereto the desired elasticity and also giving to the whole the required circumferential y form; and secondly for filling the spaces on ach protective element, of circular, ellip-l the element of rubber or other elastic material both interiorl)r and exteriorly, left by the corrugations in the steel elements' so .that when pressure takes place the rubber cork or the like compressed within said spacesoffers sullcient resistance to com iression.

pands and reassumes its original form and position. The corrugations in the rubber elements are also for purpose of avoiding to as great an extent as possible the distortions liable to be roduced under the influence of pressure. of) ments.

The tire produced by the sim le juxtaposition of the elements described) is possibly incapable of resisting strong pressure, especially if used for heavy vehicles 'and to overcome this objection an air chamber a com letely traversing said elements maybe use( as shown in Fig. 2. The said air chamv 0n ces- I. sation oi' the latter the rub er or the like ex` the corrugated steel eleber may be in the forni of a Coil or tube closed at each end, said ends abutting when the chamber is introduced into the series of protecting elements; or it may be formed in the known manner of a continuous ring or tube. In this case it would be necessary for its introduction into the elements' to split the latter on a generating line and to use steel collars the overlapping ends of which are connected by a screw and nut as in Fig. 4

or by other suitable means., The ends of the Arubber or like collars Would obviilusb r be connected again by simple pressure. v

vThe flexible metallic collars B which form the protection for the air chamber referably overlap leach other as shown in. igs. 24

of the metallic parts to'their normal sha fe. l I

' What Iv claim and'desire tasecure by etv ters` Patent ofthe United States is In a tire an elastic member comprising an 'part substantia outer part of elastic material externally smooth'and having interior eorrugations7 an intermediate corrugated metallic resilient 'part 'whosecorrugations engage those in the outer part, and an inner part of elastic material internally smooth and having exterior corrugations engaging those of `the metallic y as described.

Infwitness whereof I have signed this specification in the presence of two Witnesses,

MATHIEU RUN' Wftnesses: l

JEAN GERMAIN, A' HLPPOLYTE VIL'LnnoNGUE. 

